Fix exception when changing clothes in KKS studio (#12)

It seems to be due to the [Coordinate Load Option] not being well behaved, but it seems that the source code is not available over there, so please allow me to fix it here.
Also, the method of getting _ksox in Awake() worked well. However, I thought it was not a good idea to write code in Awake that depends on the behavior of other components (calls to AddComponent), so I decided to set it up in Reload in a limited way.

Core_SkinEffects/SkinEffectsController.cs

@@ -424,6 +424,9 @@ protected override void OnReload(GameMode currentGameMode, bool maintainState)
             DisableDeflowering = false;
             _talkSceneTouchCount = 0;
 
+            if (_ksox == null)
+                _ksox = GetComponent<KoiSkinOverlayController>();
+
             var data = GetExtendedData();
 
             if (!MakerAPI.InsideAndLoaded || MakerAPI.GetCharacterLoadFlags().Parameters)